If you apply those percentages to the unregistered voters (this assumes if they were to register, the same percentages would probably apply), this works out to 58.2 million unregistered potential Dem's, 41.5 million unregistered potential Rep's, and 33.3 million unregistered potential Ind's.

Let's assume the Republicans were a lost cause in this scenario, due to their conservative views.
The number of unregistered potential Dem's plus the unregistered potential Ind's is 91.4 million unregistered. At the 1/3rd, 1/3rd. 1/3rd split you mention below, that leaves 60 million unregistered that might be persuaded to vote. Forget the last 1/3rd, those are the one's that simply don't care, so they probably won't be voting no matter what.

If half the registered Ind's got behind a single candidate = 12 million voting for Independent candidate 'A.'
If one out of ten registered Dem's (those most disgusted with Obama) could get on board = 4.2 million "converts." That's 16.2 million voting for Independent candidate'A.'

Just half the Ind's and one out of ten Dem converts voting for Ind candidate 'A' leaves a 21.6 million voter deficit for Candidate 'A' to tie Obama.

If one out of five disgusted Dem's converted, it leaves a deficit of 17.4 million voters.

There's still 12 million registered Independents up for grabs.
There's still 60 million unregistered potential votes up for grabs.

The Ind's would need 17.4 million votes out of a potential pool of 72 million people of voting age.

This scenario completely ignores any potential Republican converts.

The numbers are there. They're to be found in the 66 million registered Dem's and Ind's and the 60 million unregistered potential voters.

If the 42 million registered Dem's all voted for Obama, that represents only 18.3% of all Americans of voting age and above. In other words, Obama will be elected although only 18.3% of all voters want him.

Yep to get myself called up for jury duty every time I turn around, it better be someone I believe in. All I've seen has been crap. I still want to shoot myself because I voted for Clinton the first time around.